Murtashan, each mod have server-side installation instruction.
Read the description, and you will find if any pre requirements needed.
Murtashan wrote:I setup the folder BasilMod/pinglimit and placed files but cannot exec in console.
Make sure you placed files to your server root folder, i.e. "Steam\steamapps\common\Life is Feudal Your Own Dedicated Server\BasilMod\PingLimit", and that you are entering command to your server console.
Basically, module setup does not require console(although it provides extra functionality), you should edit your server main.cs file, i.e. "Life is Feudal Your Own Dedicated Server\main.cs".
Blackdrakon wrote:The BasilMod::Pack file needs to be installed server side first
You are wrong here. Some mods require BasilMod::Pack, others do not. Same for client: client installation of BasilMod::Pack required only if server GM say so.